feat(waveform): generalize high-res compute to every track (Direction B)

Per-track high-res datum keyed by EntryKey in the renamed track-waveforms vault; computed at upload for all tracks, regenerable per-track via CMS, with a re-runnable backfill. Mix read path repointed so it keeps working.

DeepDrftContent/Processors/WaveformProfileService.cs

@@ -42,9 +42,9 @@ public class WaveformProfileService
     /// <paramref name="entryKey"/> in <paramref name="vaultName"/> (defaults to
     /// <see cref="VaultConstants.WaveformProfiles"/> when null). Bucket resolution defaults to
     /// <see cref="WaveformProfileOptions.BucketCount"/> (512) when <paramref name="bucketCount"/> is null;
-    /// callers pass an explicit count for higher-resolution data — e.g. the Mix datum derives its count
-    /// from the audio duration (≈333 samples/sec, see <c>MixWaveformResolution</c>) so long mixes are not
-    /// under-sampled. This service is content-agnostic: it captures however many buckets it is told to and
+    /// callers pass an explicit count for higher-resolution data — e.g. the per-track high-res datum
+    /// derives its count from the audio duration (≈333 samples/sec, see <c>WaveformResolution</c>) so long
+    /// tracks are not under-sampled. This service is content-agnostic: it captures however many buckets it is told to and
     /// does not itself decide the count. Returns false (and logs) on any
     /// failure — a missing profile is handled gracefully downstream, so callers on the upload path
     /// log-and-continue rather than failing the upload. Does not throw for expected failure modes.
@@ -99,6 +99,24 @@ public class WaveformProfileService
         }
     }
 
+    /// <summary>
+    /// Computes a track's high-resolution loudness datum and stores it in the
+    /// <see cref="VaultConstants.TrackWaveforms"/> vault keyed by <paramref name="entryKey"/>. The bucket
+    /// count is duration-derived (≈333 samples/sec, clamped — see <see cref="WaveformResolution"/>) so the
+    /// datum captures at a constant time resolution regardless of track length. This is the single home
+    /// for "the high-res per-track datum" — the upload path, the CMS generate action, and the Mix trigger
+    /// all funnel through it, so every track (Mix, Session, Cut) gets an identical datum keyed the same way.
+    /// Returns false (logged) on any failure, per the content-agnostic contract above.
+    /// </summary>
+    public Task<bool> ComputeAndStoreHighResAsync(
+        ReadOnlyMemory<byte> wavBytes,
+        string entryKey,
+        double durationSeconds)
+    {
+        var bucketCount = WaveformResolution.BucketCountForDuration(durationSeconds);
+        return ComputeAndStoreAsync(wavBytes, entryKey, bucketCount, VaultConstants.TrackWaveforms);
+    }
+
     /// <summary>
     /// Returns the stored quantized profile bytes for a track from <paramref name="vaultName"/>
     /// (defaults to <see cref="VaultConstants.WaveformProfiles"/> when null), or null if no profile